Portable wireless speaker



FIG. 1 is a perspective view of a portable wireless speaker showing my new design;

FIG. 2 is another perspective view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a left side view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

The broken lines shown in FIG. 1 and FIGS. 3-8 illustrate portions of the portable wireless speaker that form no part of the claimed design. 

CLAIM The ornamental design for a portable wireless speaker, as shown and described. 